(57) Compounds of the general formula
in which R is a hydrogen atom, a methyl group or an ethyl group; R' is a methyl, ethyl,
monochloromethyl or monobromomethyl group; R2 is a methyl or ethyl group; or R' and R2 together with the carbon atom to which they are attached form a cyclopropyl group;
and each of R3 and R4 independently is an alkyl, alkoxy, monoalkylamino or dialkylamino group, in which
the or each alkyl moiety has 1 to 4 carbon atoms; provided that if R' represents a
monochloromethyl or monobromomethyl group, then R represents a methyl or ethyl group;
have useful pesticidal properties.
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